What is contact process equation?
In the first stage of the contact process, sulfur is burned in air to make sulfur dioxide: sulfur + oxygen → sulfur dioxide. S(l) + O 2(g) → SO 2(g) This is not a reversible reaction – (l) means liquid and (g) means gas. Sulfur dioxide should not be released into the atmosphere as it contributes to acid rain .
What are the steps of the contact process?
The contact process is divided into three stages:
- Stage: Sulphur dioxide preparation and purification.
- stage: Conversion of sulphur dioxide to sulphur trioxide by catalytic oxidation.
- Stage: Sulphur trioxide is converted into Sulphuric acid.
What are the reaction conditions for the contact process?
The process can be divided into six stages: Combining of sulfur and oxygen (O2) to form sulfur dioxide. Purifying the sulfur dioxide in a purification unit. Adding an excess of oxygen to sulfur dioxide in the presence of the catalyst vanadium pentoxide at 450 °C and 1-2 atm.
Why contact process is called contact process?
The term “contact process” stems from the fact that the usually solid catalyst is also called a “contact” in a heterogeneous cataly- sis. As the demand for sulfuric acid could be met by the lead chamber process in the middle of the 19th century, there was initially no incentive to develop the process further.
What are the steps in the contact process?
The Contact Process. 1 Step 1: Make sulfur dioxide. 2 Step 2: Convert sulfur dioxide into sulfur trioxide (the reversible reaction at the heart of the process) 3 Step 3: Convert sulfur trioxide into concentrated sulfuric acid.
Which is the chemical reaction in the contact process?
2SO2 (g) + O2 (g) ⇌ 2SO3 (g) + 45 KCal. 2 volumes of reactants give 2 volumes of reactants. The reaction occurs in the presence of a catalyst, i.e., V2O5 (contact process catalyst) at a temperature of 450 °C. This reaction is the key chemical reaction occurring in the contact process.
What is the temperature of the contact process?
The reaction occurs in the presence of a catalyst, i.e., V2O5 (contact process catalyst) at a temperature of 450 °C. This reaction is the key chemical reaction occurring in the contact process. It is a reversible, exothermic reaction (a large amount of heat is released), accompanied by a decrease in the volume.
How does the contact process produce sulfuric acid?
Contact process, modern industrial method of producing sulfuric acid; it has largely replaced the chamber, or lead-chamber, process. Sulfur dioxide and oxygen, passed over a hot catalyst, unite to form sulfur trioxide, which in turn combines with water to make sulfuric acid. Read More on This Topic chemical industry: Contact process
